/*
 * Copyright 2015 The FireNio Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package test.others.socket;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.channels.AsynchronousChannelGroup;
import java.nio.channels.AsynchronousServerSocketChannel;
import java.nio.channels.AsynchronousSocketChannel;
import java.nio.channels.CompletionHandler;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
import java.util.Date;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;

import com.firenio.common.Util;

/**
 * @author wangkai
 */
public class AioServerDemo {
    private static Charset        charset = Charset.forName("UTF-8");
    private static CharsetEncoder encoder = charset.newEncoder();

    public static void main(String[] args) throws Exception {
        AsynchronousChannelGroup group = AsynchronousChannelGroup.withThreadPool(Executors.newFixedThreadPool(4));
        AsynchronousServerSocketChannel server = AsynchronousServerSocketChannel.open(group).bind(new InetSocketAddress("0.0.0.0", 8013));
        server.accept(null, new CompletionHandler<AsynchronousSocketChannel, Void>() {
            @Override
            public void completed(AsynchronousSocketChannel result, Void attachment) {
                server.accept(null, this); // 接受下一个连接
                try {

                    ByteBuffer readBuffer = ByteBuffer.allocate(999);

                    result.read(readBuffer);

                    String     now    = new Date().toString();
                    ByteBuffer buffer = encoder.encode(CharBuffer.wrap(now + "\r\n"));
                    // result.write(buffer, null, new
                    // CompletionHandler<Integer,Void>(){...}); //callback
                    // or
                    Future<Integer> f = result.write(buffer);
                    f.get();
                    System.out.println("sent to client: " + now);
                    result.close();
                } catch (IOException | InterruptedException | ExecutionException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void failed(Throwable exc, Void attachment) {
                exc.printStackTrace();
            }
        });

        Util.sleep(9999999);

        group.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS);
    }
}
